Charge-forming device for internal-combustion engines



- 1,646,505 Qch 1927" H, T. THOMAS CHARGE FORMING DEVICE FOR INTERNAL comsuswxou ENGINES Q inal Filed June 22,1920

A TTORNE Y.

Patented- Oct. 25, 1927.

ui'ran srnr s Hermon '1. machine, or LAnsIns, rrrcmean.

.QHARGE-FORMING DEVICE FOR INTERNAL-COMBUSTION ENGINES.

trig'lnal application filed June 22, 1920, Serial No. 30,762. Divided and this application filed December V 27, 1924. Serial No. 758,476.

My invention relates to a charge-forming device for an internal combustion engine and an object of my improvements is to provide for-more complete vaporization of the fuel and uniformity of the mixture. 'This application is a division'of application No. 390,762, filed June 22, 1920. Inthe accom panying drawing Figure 1, is an elevation partly in section of an apparatus embodyin my invention and so much of an interna combustion engine as is necessary to illustrate its connection therewith.

Fig. 2,is an elevation of a complete manifold of an internal combustion engine, the

vintakepipe and an apparatus embodying my invention connected therewith.

(1, indicates the exhaust manifold and b the intake pipe or passage. 0, is a carbn retor construction located at, and closing the lower, or entrance end of the, passage 6. e,

is a chamber formed, in the carburetor 0,.

having its upper end open, except as hereinafter described, and its lower end closed, ex-

cept for the spraying-jetnozzle, 0 which opens from the body, or reservoir, of the carburetor 0, into the chamber 0. I

(l, is a tube provided with a circular flange at its upper end, contracted at 11 near its lower end and from thence gradually expanding to the chamber 6. The tube'd gradually expands upwardly from the contraction, (5 to its open upper end; The nozzle, 0 has its open, or'delivery end, at the center of the contracted part, (1 of the .tube d. Thus, the tube at forms a Venturi tube clos'ngthe upper end of the chamber a, and f rming the delivery passage from said chamber to the interior of the passage d.

h, is an expansible thermostatic chamber adjustably secured to a stationary lug, h, by a screw-threaded shank, h, and pro vided with a slide rod, or valve, k fitting and adapted to reciprocate in a lateral passage, g, in the tube, or passage,

f, is a passage, the outer an of which fits tight against the end of the passage, g. The slidable rod, h is cut away at its side at h, so that when it is first actuated, it tends to close the passageway through g, and when further actuated, provides a passage through the cut-away portion, h, from the outer air to supply an auxiliary quantity of vrequired quantity of atmospheric air is drawn from the passage, 6 v

I have placed the thermostatic chamber h beside of, and close to, the passage 6, so that its temperature shall closely correspond to the temperature of the passage b. Of course, the thermostatic chamber h may be located at another place.

The operation of the above described apparatus is as follows I When the engine starts in operation, the air and exhaust gases are drawn from the manifold a through the passage, g, into the lateral passage, f and through the latter into the chamber, 0, from whence they pass through the tube, d, spraying and vaporizing the liquid fuel delivered from the nozzle, c the heat of said gases assisting the vaporization of the sprayed liquid fuel. The hot exhaust gases very completely vaporize the liquid fuel and the incoming air, by the passage, 6 readily absorbs such-completely vaporized fuel into its mass.

The intake passage, is connected with the exhaust passage so that a considerable amount of the first charges supplied to the engine shall be drawn from said exhaust passage, that is to say, the intake is at first connected to the exhaust passage by a sub 1. In a charge-forming device for internal combustion engines, the combination of en intake passage, means for delivering liquid fuel in said passage, an exhaustpassagesaid intake passage being extended to communicate by a substantially closed passage with said exhaust passage upon the side of the delivery point for fuel remote from the engins, and thermostatically-controlled means or admitting air to said closed assage.

2. In a charge-forming device or internal a mw sss combustion engines tbs combination M an for admitting air to said closed passage, said intake passage, means for delivering liquid thermostat?sally-centralised' means being so 0 fuel in said passage, an exhaustpassags, said located that its temperatureshzi-ii, corresponii intake passage being extended to communi to that; 0f the intakepmssage to the engine 5 cats by a substantially closed passage with .In testimony ,Whsreaf, I sign this speci said exhaust passage upon the side of the fication. delivery aim for fuel remote from the en gins, ami iiiermsststicaliy -controlied means ,HORAGE T. THOMAS 

